Magnetic ball marker



FIG. 1 is a front view of a magnetic ball marker showing my new design;

FIG. 2 is a rear view of the magnetic ball marker;

FIG. 3 is a left side view of the magnetic ball marker, a top view, a bottom view, and a right side view each being identical thereto; and,

FIG. 4 is a top front side perspective view of the magnetic ball marker.

For clarity, the body of the marker is symmetrical and the back face of the marker is planar. 

CLAIM The ornamental design for a magnetic ball marker, as shown and described. 